76561620786 has 48 divisors (see below), whose sum is σ = 192410746944. Its totient is φ = 21548257632.

The previous prime is 76561620763. The next prime is 76561620823. The reversal of 76561620786 is 68702616567.

76561620786 is a `hidden beast` number, since 7 + 6 + 5 + 6 + 1 + 620 + 7 + 8 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4526125 + ... + 4543008.

It is an arithmetic number, because the mean of its divisors is an integer number (4008557228).

Almost surely, 2^76561620786 is an apocalyptic number.

76561620786 is an abundant number, since it is smaller than the sum of its proper divisors (115849126158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

76561620786 is a wasteful number, since it uses less digits than its factorization.

76561620786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9069215 (or 9069212 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 76561620786 in words is "seventy-six billion, five hundred sixty-one million, six hundred twenty thousand, seven hundred eighty-six".